Mine

The mine grenade, along with EMP and smoke, are currently the newest grenades to be released. The grenade is meant for booby traps, such as planting them near the portal location, to annihilate enemies when they appear. The grenade does about 99% damage to an enemy, And does not one-hit-kill a full health soldier. However, an enemy can be quickly finished off when wounded by a mine. The mine can also be placed around a flag, thus preventing the enemy from it. However a mine can be detonated when shot at by a Soldier. This effect does not work in water.

There was a glitch, when a Soldier would have a double barrel or a shotgun, and be able to propel themselves hundreds of feet into the air by detonating the grenade underneath themselves. This was immensely popular with many players until the bug was patched by the developer Docski.